Spark-plug.



A. R. MOSLER.

SPARK PLUG..- APPLICATION FILED SEPT I7. 1915.

1,256,719. Patented Feb.19,1918' E/yl v 4 13 /,2 ll 3 6 H, 70 17 4 i I I J W5 Q Ina swim? UNITED STATES Pf ELENT QFFIQE.

B. MQSTLEE (3F NEW YORK,- HL Y.

Applieatimz Shed Seyfiem'ber 1 f, 1915.

Be it inmwn that L Amxzmz R jfi'iosmm citizen m? 313 United Smms, and at the bm'wgh sf Manhattun in @116 city and m 1 r 5mm i=1 3W 01%, have unnamed a new and usefui Imprm'ement in Spm'k-lfiugs, 01" Whlfih H113 foliawmg 1s; sweclfimtwn.

inventlcn t impmvcment 3E0cks therein; be Macks fm anc'i term cane i pleted ping". black 9f c r nis diame tars, we remaining mu m Emgih and the ether? increasing with me lengh sf the plug, I conid get a 'beifizfir ?c :z1ancad 1310c which would be less apt fie brmki The 6% struction of my block is such that there is a greater distance between Hm: hearing points of th block within the plug than there was in plugs hsremfore used Where the Qniarge perien was :mert compare l wi'th the emi pm'tionsfi This contributes greafly m the strength 01 bloc: $113 ween ifmzq; the disatanss be'ween the bearing points increased as the plug increases in length,

Sgecificwbiazzz m Elettars Patcntu Paiem'mc'i Feb; 19, HHS,

fierial 3: 50. LSMEQ.

thus making the :Eangest stmhg' as the shorter ones,

A practlcal embadxment 01'' my lnvenimn 1s repzesentegi m accompanymg drawmgs, m which Flgure 1 1s iongflucinmi @em'm. sect-x011.

thmugh a spark plug having an 'nsuiating block embodying my invention, 2.136%

Fig. 2 is 2: similar View 015' huge! pfiug. Thee insuiating 015d; 9031 tha reduced'. 3211162 @1163 pmitiun 9;, the E'EdUGQd miter end portian 8 and the enizzzgeii iniewmediaz portion 4% the fsrmaticn @i which 13? vides the @nmzizzr shov 8 extendin ariiun i the pempn s bios e engi 9; sma l H pmtmn 4.- 0f the e i ldii with a we shouider shauider 8, 32911 sen W @f ihe black gasket A. heflaw b'fimk and 2% with the we 5 is pmviqis with 1m! tween which an ji s? is inserisd. a packing the insmisiing engagement mil Y which cap u an shou'klw 1 beinnaz pmt 16 being ncyeasedi in iength W312i a bhek :39? a is plug is (leaked while the outer paw:- l'? is (3 1 subsizmtiaily wnstaint lenfzih a2 iength W219i; 1 claim is:

L In spark p 125: a hnliew shall, a hallow cap, insuhtig mack having relatively short. inns? and 022%? l'efiuced end portinns, an enlarged intermecfiate portion of differeni diameters, and packing rings between the inner and 6f the intermediate por tion am? the Shel} and between 112 nuter end sf the; intermediate pnrtian and fihe cap.

In & sp t ping, a hQEEOW shell, a hol- Qsw an msuiating bbck having relafsivei ft inner and mater reduaed em portiona, an enim'gfi intermediate portion at different diam fiers and packing rings 3; 1011mm 6 of the black iweizween per-:2; ei the insermeciiete pertien having the diameter and the shell and between the Dart of the interme- L K1 portien havin." the smallest diameter insulating bleak for bug spar galugs having she Eucec; inner and. enter end pertions M14311: enlarged infiermeeiae 'ien difierez: ellemeters, the dis tenee meeme between the bearing shoulders at the inner 10 and outer ends of the enlarged intermediate portion being greater than the length of either the inner or outer end. portion.

in testimony, that I claim the foregoing as my invention, third day of August, 1915.

ARTHW R. MOSLER.

I have signed my name, this 15 

